(function(window, document, undefined) {
	var interval = 800;
	var closeDelay = 200;
	var index = 0;
	var couponLinks;
	var getCoupon = function() {
		if (index >= couponLinks.length) {
			console.log("领取完毕");
			return;
			}
		var coponLink = couponLinks[index];
		coponLink.click(); index++;
		console.log("领取 第" + index + " 张");
		setTimeout(getCoupon, interval);
		setTimeout(function() {
			var close = document.querySelector('.mui-dialog-close');
			if (close != null) close.click();
			}, closeDelay);
		}
	var _scrollTop = 0;
	var _scrollStep = document.documentElement.clientHeight;
	var _maxScrollTop = document.body.clientHeight - document.documentElement.clientHeight;
	var autoScrollDown = setInterval(function() {
		_scrollTop += _scrollStep;
		if (_scrollTop > _maxScrollTop) {
			clearInterval(autoScrollDown);
			couponLinks = document.querySelectorAll('.mui-act-item-yhqbtn');
			console.log("总共：" + couponLinks.length + "条张优惠券待领取...");
			getCoupon();
			} else {
				document.body.scrollTop = _scrollTop;
				}
			}, 500);
}) (window, document);